JAMMING METHOD AND DEVICE Russian patent published in 2015 - IPC H04K3/00 

FIELD: radio engineering, communication.

SUBSTANCE: jamming method includes measuring coordinates of the characteristic location, determining the composition a global navigation satellite system (GNSS) orbital group used in a given area, and the number of operating satellites therein; simultaneously receiving navigation message signals from the operating satellites for all GNSS users in the given area; storing the received messages; distorting the navigation messages therein by delaying by different time intervals, after which a resultant interfering signal with distorted navigation messages is generated; synchronising the resultant interfering signal with signals of navigation messages of GNSS satellites; emitting the resultant interfering signal with power higher than that of legitimate signals of the GNSS satellites, wherein during prolonged operation, stored navigation messages are periodically updated. To generate the interfering signal, the method includes predetermining classes of GNSS users, accurately setting coordinates of false routes and traffic speed thereon for each class of GNSS users, and during operation, determining the class of GNSS users located in the given area, for each current moment in time t_i and the corresponding j^th point of the assigned false route with an interval Δt, Δt=t_i-t_i-1, calculating the required delay of navigation messages for each operating GNSS satellite.

EFFECT: prolonged concealed distortion of navigation parameters for radio navigators of a group of users located in a spatially limited but known area.

3 cl, 10 dwg